* {
    padding: 0;
    margin: 0;
    font-size: 14px;
}
a {
    color: #222;
    text-decoration: none;
}
a:hover {
    color: #315efb;
}
li {
    list-style: none;
}
.clearfix::after {
    width: 0;
    height: 0;
    content: '';
    display: block;
    visibility: hidden;
    clear: both;
}
.fex_left {
  float: left;
}
.fex_right {
    float: right;
}


#main {
    width: 700px;
    height: auto;
    overflow: hidden;
    margin: 50px auto;
}
